darkicewolf50/RustBrock

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.gitea

.github

.obsidian

HelloWorld

actix_web_learning

adder

branches

functions_rust

guessing_game

hello_cargo

loops

minigrep

ownership

rectangles

.gitignore

Cargo Workspaces.md

Cargo and Cratesio.md

Closures.md

Collection of Common Data Structs.md

Constants.md

Crates.md

Custome Build Profiles.md

Data Types.md

Deref Trait.md

Drop Trait.md

Enums.md

Error Handling.md

Extending Cargo.md

For later baja.md

Generic Types Traits and Lifetimes.md

Generics.md

Hash.md

Improving The IO Project.md

Install Binaries.md

Iterators and Closures.md

Iterators.md

Lifetimes.md

Modules and Use.md

Packages.md

Paths.md

Primitives.md

Project Organization.md

Publishing libraries.md

README.md

Reducing_Code_Duplication.md

Reference Counter Smart Pointer.md

RustBrock.code-workspace

Smart Pointers.md

String.md

Structures.md

Test Controls.md

Test_Organization.md

Tests.md

The Performance Closures and Iterators.md

Traits.md

Using Box on the Heap.md

Variables.md

Vector.md

Writing_Tests.md

data_types.md

ownership.md

darkicewolf50 30047d24ea tried out obsidian, started ch 6.2

2025-01-08 11:53:20 -07:00

368 B

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Constants

Can be declared anywhere,
The convention to use all caps in a constant's name
Needs const keyword
Not always evaluated at compile time (there are rules for this but too complex to know everything)
Variables can only be assigned once (needs mut to assign more than once (need to be same type))

const SECONDS_PER_HOUR: i32 = 60 * 60;

368 B Raw Blame History

Constants

368 B

Raw Blame History